This a map of a Chrome binary, answering some of the question: how many bytes do our various bits of code contribute to the final executable? See the announcement for more background and a list of caveats.
Colophon: I call the treemaping widget webtreemap and it should be easy for you to embed in other projects; I also put up the hacky code that extracted the data from the binary in another github repo, though it's a relatively straightforward use of nm.
Click on a box to zoom in. Click on the outermost box to zoom out.